JP2017109772A - Connector, socket, and liquid storage container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector comprising a socket which can be attached to a plug surely without a complicated work.SOLUTION: A connector 300 comprises: a plug 200 fixed to an inner peripheral surface of an opening part 410 of a liquid storage container; and a socket 100 detachably attached to the plug 200. The plug 200 comprises a plug body 210 in which, a first liquid outflow channel 211, a first liquid inflow channel 212, and a first air channel 213 are formed therein. The socket 100 comprises a socket body 110 in which, a second liquid outflow channel 111, a second liquid inflow channel 112, and a second air channel 113 are formed therein, and a ball lock mechanism 120 for engaging plural lock balls 121 to an engagement groove 411 formed along a peripheral direction around an axial line X1 on an outer peripheral surface of the opening part 410 of the liquid storage container, then fixing the plural lock balls 121 to the engagement groove 411.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a connector, a socket, and a liquid storage container.

2. Description of the Related Art Conventionally, a plug and a socket that are attached to a liquid container such as a chemical solution used for semiconductor manufacturing are known (for example, see Patent Document 1).
The plug disclosed in Patent Literature 1 is attached by being press-fitted inside the opening of the liquid storage container. Further, the socket disclosed in Patent Document 1 has a sleeve formed with an inner screw, and by fastening the inner screw of the sleeve to the outer screw formed outside the opening of the liquid storage container, Attached outside the opening of the liquid container.

JP 2009-173326 A

  However, when the socket disclosed in Patent Document 1 is attached to the opening of the liquid container having the plug attached to the inside, the socket is rotated and the sleeve is rotated to be fastened to the external screw of the opening. There is a need to. Further, when removing the socket disclosed in Patent Document 1 from the opening of the liquid storage container, it is necessary to rotate the sleeve to release the fastening with the external screw of the opening.

Thus, the socket disclosed in Patent Document 1 requires a complicated operation of rotating the sleeve when the socket is attached to the opening of the liquid storage container.
The fastening state between the inner screw of the sleeve and the outer screw of the opening of the liquid storage container is confirmed by the judgment of the operator. Therefore, the determination of the fastening state differs for each worker, and there is a possibility that the inner screw of the sleeve and the outer screw of the opening of the liquid storage container are not sufficiently fastened.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a connector including a socket that can be securely attached to a plug without requiring a complicated operation. It is another object of the present invention to provide a socket that can be securely attached to a plug without requiring complicated work. It is another object of the present invention to provide a liquid storage container applied to a socket that can be securely attached to a plug without requiring a complicated operation.

In order to solve the above problems, the present invention employs the following means.
A connector according to an aspect of the present invention is a connector that is attached to a liquid storage container having an opening formed in a cylindrical shape around a first axis, and is fixed to an inner peripheral surface of the opening. A plug that is detachably attached to the plug, and the plug flows in from a first liquid outflow passage for taking out the liquid stored in the liquid storage container, and from the outside of the liquid storage container. A first liquid inflow channel that guides the liquid to the inside of the liquid storage container, and a first gas channel that allows the outside air to flow between the internal space of the liquid storage container and the external space of the liquid storage container are inside. The socket has a formed plug body, and the socket has a second liquid outflow passage for letting out the liquid taken out from the first liquid outflow passage and the liquid flowing in from the outside of the liquid storage container. A second liquid inflow channel that leads to the liquid inflow channel and a second gas channel that is connected to the first gas channel and allows external air to flow between the internal space and the external space are formed inside. A plurality of lock balls which are attached to the socket body and engaged with engagement grooves formed along the circumferential direction around the first axis on the outer peripheral surface of the opening. And a ball lock mechanism for fixing the lock ball to the engagement groove.

  According to the connector of one aspect of the present invention, for example, when the socket is attached to the plug, the liquid taken out from the first liquid outflow passage of the plug is sucked into the socket by sucking the liquid with an external pump. It flows out through the second liquid outflow channel. Further, the liquid circulated by the external pump is guided from the first liquid inflow channel of the plug to the inside of the liquid storage container via the second liquid inflow channel of the socket. Also, the amount of outside air that replaces the reduced amount of liquid stored in the liquid storage container is transferred from the external space of the liquid storage container to the internal space via the second gas flow path of the socket and the first gas flow path of the plug. Led.

  As described above, the connector according to one aspect of the present invention includes the outflow of the liquid stored in the liquid storage container to the outside, the inflow of the liquid that has flowed out and circulated to the liquid storage container, and the liquid storage container. It has a structure that allows introduction of outside air according to the amount of liquid that is stored.

  In addition, the socket provided in the connector according to one aspect of the present invention engages the plurality of lock balls after engaging the engagement grooves formed on the outer peripheral surface of the opening of the liquid storage container by the ball lock mechanism. Since it is fixed to the mating groove, it can be securely attached to the plug without the need for complicated work.

  In the connector according to an aspect of the present invention, the ball lock mechanism includes the plurality of lock balls and a plurality of opening holes that are formed in a cylindrical shape around the first axis and have a smaller diameter than the outer diameter of the lock ball. A first cylindrical member having a cylindrical shape around the first axis and disposed on an outer peripheral side of the first cylindrical member, and the lock ball received in the opening hole is inserted into the engagement groove A second cylindrical member having a restricting portion for restricting to a state engaged with the first cylindrical member, and one end along the first axis is fixed to the first cylindrical member and the other end along the first axis is It may be configured to include an urging force generator that is fixed to the second cylindrical member and urges the second cylindrical member toward a position where the restricting portion contacts the lock ball.

According to the connector of this configuration, when attaching the socket to the opening of the liquid container having the plug fixed to the inner peripheral surface, the operator pulls the second cylindrical member upward along the first axis. The restricting portion is retracted so as not to contact the lock ball. Therefore, the operator can attach the socket to the plug in a state where the lock by the ball lock mechanism is released.
Further, the worker can put the socket in a state of being fixed to the outer peripheral surface of the opening without requiring a complicated operation by separating the second cylindrical member after attaching the socket to the plug. This is because the urging force from the urging force generating portion is applied to the second cylindrical member by separating the second cylindrical member, and the restricting portion moves to a position where it comes into contact with the lock ball, and the plurality of lock balls are engaged. It is because it will be in the state fixed to the groove | channel.

Further, according to the connector of this configuration, the operator pushes the socket into the plug without touching the second cylindrical member when attaching the socket to the opening of the liquid container having the plug fixed to the inner peripheral surface. Thus, the lock ball can be retracted. This is because the force by which the operator pushes the socket becomes a force that opposes the urging force of the urging force generating portion, and the second cylindrical member moves so that the lock ball can be retracted.
Then, the operator pushes the socket into the plug until the lock ball reaches the position of the engagement groove, so that the lock ball is fixed to the engagement groove by the urging force of the urging force generating portion. In this way, the operator can make the socket fixed to the outer peripheral surface of the opening without requiring complicated work.

In the connector configured as described above, the ball lock mechanism may include a rotation restricting mechanism that restricts the second cylindrical member from rotating about the first axis with respect to the first cylindrical member. Good.
By doing so, the second cylindrical member rotates around the first axis with respect to the first cylindrical member, and the urging force applied to the second cylindrical member by the urging force generator changes. Can be suppressed.

  In the connector configured as described above, a cylindrical insertion hole is formed in the socket body along a second axis that intersects the first axis so as to penetrate the second liquid outflow channel and the second liquid inflow channel. And the socket has an outflow through hole formed at a position where the second liquid outflow channel is disposed on the second axis and the second liquid inflow channel on the second axis. And a cylindrical rotary valve inserted into the insertion hole, and when the rotary valve rotates around the second axis, the outflow An open state in which the through hole communicates with the second liquid outflow channel and the inflow through hole communicates with the second liquid inflow channel; the outflow through hole and the second liquid outflow channel; Do not communicate with each other and the inflow through hole and the second liquid inflow Doo and closing mechanism for switching between the closed state of not communicating may be in the form with.

  In the structure where the flow state of the liquid is switched by contact or separation between the valve body provided in the socket and the valve seat provided in the plug, there is a portion where the cross-sectional area of the flow path is locally reduced and the valve body is attached to the closed state. A biasing mechanism is provided. Therefore, when the liquid is a slurry containing an abrasive or the like (a suspension in which solid particles are dispersed), the solid particles adhere to the portion where the flow path cross-sectional area is locally reduced, and the liquid flowability is deteriorated. I will let you. Further, when solid particles adhere to the urging mechanism of the valve body and solidify, the valve body cannot be opened and closed smoothly.

On the other hand, according to the connector of the above aspect, the second liquid outflow passage and the second liquid are switched via the outflow through hole and the inflow through hole by switching the rotary valve to the open state or the closed state by the opening / closing mechanism. It is possible to switch between an open state in which liquid flows through the inflow channel and a closed state in which liquid does not flow through the second liquid outflow channel and the second liquid inflow channel via the outflow through hole and the inflow through hole. .
Therefore, it is possible to suppress a problem that solid particles accumulate in a portion where the flow path cross-sectional area is locally reduced to deteriorate the liquid flowability. In addition, since the biasing mechanism that opens and closes the valve body by the biasing force can be prevented from existing in the flow path, solid particles accumulate in the biasing mechanism and the valve cannot be smoothly opened and closed. can do.

In the connector according to the above aspect, the opening / closing mechanism may include a lock member that restricts the second cylindrical member from moving upward along the first axis in the open state.
Since the second cylindrical member is directed to the position where the restricting portion comes into contact with the lock ball by the biasing force generating portion, the socket is fixed to the outer peripheral surface of the opening by the ball lock mechanism. However, if the second cylindrical member is pulled upward due to an erroneous operation or the like, the socket may come off from the outer peripheral surface of the opening. If the socket is detached from the outer peripheral surface of the opening while the rotary valve is open, the liquid may flow out to the outside.
Therefore, in this connector, since the second cylindrical member is restricted from moving upward in the open state of the rotary valve, the restriction portion is separated from the lock ball and the socket is detached from the outer peripheral surface of the opening portion. There is no. Thereby, the outflow of the liquid to the exterior by erroneous operation etc. can be prevented reliably.

  In the connector according to one aspect of the present invention, the plug is attached below the plug main body and has a cylindrical inner pipe that guides the liquid stored in the liquid storage container to the first liquid outflow channel, A cylindrical outer tube that is attached to the plug body and disposed outside the inner tube, and forms an annular channel that guides the liquid guided to the first liquid inflow channel to the inside of the liquid storage container; A sealing member that seals between the inner peripheral surface of the second lower end portion of the outer tube and the outer peripheral surface of the inner tube disposed above the first lower end portion of the inner tube, The second lower end portion of the outer tube may be configured with an outflow hole through which liquid flows out from the annular flow path into the liquid storage container.

  According to the connector of this configuration, the liquid guided to the first liquid inflow channel formed inside the plug body is guided to the annular channel formed between the inner tube and the outer tube, and the outer tube The liquid flows out from the outflow hole formed in the second lower end into the liquid storage container. Since the liquid flows out from the outflow hole at the second lower end portion of the outer tube, the liquid flows out in the direction in which the outflow hole opens, and the liquid near the bottom surface of the liquid storage container flows well. Therefore, when the liquid is a slurry containing a polishing material or the like (a suspension in which solid particles are dispersed), a state in which the solid particles and the liquid are well mixed in the vicinity of the bottom surface of the liquid storage container is maintained.

  A socket according to an aspect of the present invention is a liquid that is attached to a liquid storage container having an opening formed in a cylindrical shape around an axis and provided on an upper surface, and is taken out from a plug fixed to the inner peripheral surface of the opening. A liquid outflow passage for allowing the liquid to flow out to the outside, a liquid inflow passage for guiding the liquid flowing in from the outside of the liquid storage container to the plug, and an internal space of the liquid storage container and an external space of the liquid storage container A socket body having a gas flow path through which outside air is circulated, and a plurality of lock balls engaged with engagement grooves formed along the circumferential direction around the axis on the outer peripheral surface of the opening. And a ball lock mechanism for fixing the plurality of lock balls to the engagement groove.

  According to the socket according to one aspect of the present invention, the liquid taken out from the plug flows out to the outside through the liquid circulation channel by sucking the liquid with the external pump while being attached to the plug. Further, the liquid circulated by the external pump is guided from the plug to the inside of the liquid storage container via the liquid inflow channel. Also, an amount of outside air that replaces the reduced amount of liquid stored in the liquid storage container is guided from the external space of the liquid storage container to the internal space via the gas flow path and the plug.

As described above, the socket according to one embodiment of the present invention includes the outflow of the liquid stored in the liquid storage container to the outside, the inflow of the liquid that has flowed out and circulated to the liquid storage container, and the liquid storage container. It has a structure that allows introduction of outside air according to the amount of liquid that is stored.
Further, the socket according to one aspect of the present invention is configured such that a plurality of lock balls are engaged with the engagement grooves formed on the outer peripheral surface of the opening of the liquid storage container by the ball lock mechanism, and then these are used as the engagement grooves. Since it is fixed, it can be securely attached to the plug without requiring complicated work.

A liquid storage container according to an aspect of the present invention includes a container main body that stores a liquid, and an opening that is provided on an upper surface of the container main body and is formed in a cylindrical shape around an axis, and the inner periphery of the opening A connector having a plug fixed to a surface and a socket removably attached to the plug can be attached, and a plurality of lock balls included in a ball lock mechanism provided in the socket are engaged with an outer peripheral surface of the opening. Engaging grooves are formed along the circumferential direction around the axis.
By doing in this way, the liquid storage container which can engage appropriately the socket provided with a ball lock mechanism can be provided.

  ADVANTAGE OF THE INVENTION According to this invention, the connector provided with the socket which can be reliably attached to a plug, without requiring complicated work can be provided. Further, it is possible to provide a socket that can be securely attached to a plug without requiring complicated work. Further, it is possible to provide a liquid storage container that is applied to a socket that can be securely attached to a plug without requiring a complicated operation.

It is a block diagram which shows the liquid supply system of one Embodiment of this invention. It is the fragmentary longitudinal cross-sectional view which looked at the connector in the state where the socket was spaced apart from the plug from the front. It is the fragmentary longitudinal cross-sectional view which looked at the connector in the state where the socket was attached to the plug from the front. It is a fragmentary longitudinal cross-section which shows the ball | bowl lock mechanism in the state where the lock ball has not engaged with the engaging groove. It is a fragmentary longitudinal cross-sectional view which shows the ball | bowl lock mechanism of the state which the lock ball engaged with the engagement groove | channel. It is AA arrow sectional drawing of the socket shown in FIG. FIG. 3 is a left side view of the socket shown in FIG. 2. FIG. 4 is a left side view of the socket shown in FIG. 3. It is a fragmentary longitudinal cross-sectional view of the socket shown in FIG. FIG. 10 is a partial cross-sectional view of the socket shown in FIG. It is CC arrow end view of the socket shown in FIG. It is a fragmentary longitudinal cross-sectional view of the socket shown in FIG. It is DD sectional view taken on the line of the socket shown in FIG. It is a block diagram which shows a socket washing | cleaning system.

Hereinafter, a liquid supply system according to an embodiment of the present invention will be described with reference to the drawings.
The liquid supply system of the present embodiment shown in FIG. 1 is a system that sucks the liquid stored in the liquid storage container 400 by the pump 600 and supplies it to a plurality of supply destination devices 700.
The amount of liquid supplied to each supply destination device 700 is adjusted by a flow rate adjustment valve provided in the supply destination device 700. Of the liquid sucked by the pump 600, the remaining portion that has not been supplied to the supply destination device 700 is returned again to the liquid storage container 400 via the circulation amount adjustment valve 800.

As described above, the liquid supply system according to the present embodiment supplies a part of the liquid taken out from the liquid storage container 400 to the supply destination device 700 and returns the remaining liquid to the liquid storage container 400 to be circulated again. It has become. This is because the liquid stored in the liquid storage container 400 is a slurry that is a suspension in which solid particles are dispersed, so that the solid particles do not settle on the bottom of the liquid storage container 400.
The flow rate of the liquid circulated by the liquid supply system is adjusted by the opening degree of the circulation amount adjustment valve 800.

Here, the slurry used as the liquid in the present embodiment is a liquid containing a silica-based or ceria-based abrasive used for chemical mechanical polishing which is a wafer polishing method in semiconductor manufacturing, for example.
As shown in FIG. 1, a liquid storage container 400 included in the liquid supply system of the present embodiment includes a container main body 420 that stores liquid, and a cylindrical shape that is provided on the upper surface of the container main body 420 and that is around an axis X1 (first axis). And an opening 410 formed on the surface.

  As shown in FIG. 1, the liquid supply system of this embodiment includes a connector 300 that is attached to the opening 410 of the liquid storage container 400. The connector 300 takes out the liquid stored in the liquid storage container 400 and sends it to the pump 600, the liquid inflow path for returning the liquid via the circulation amount adjustment valve 800 to the liquid storage container 400, and the liquid storage The apparatus includes a gas flow path for introducing outside air corresponding to the amount of liquid reduced from the container 400. The connector 300 of the present embodiment realizes the outflow of liquid, the inflow of liquid, and the replacement of outside air according to the reduced amount of liquid with a single device attached to one opening 410.

Hereinafter, the connector 300 of this embodiment will be described with reference to the drawings.
As shown in FIGS. 2 and 3, the connector 300 of this embodiment includes a plug 200 that is fixed to a female screw 411 a formed on an inner peripheral surface of an opening 410 provided on the upper surface of the liquid storage container 400, and a plug And a socket 100 detachably attached to 200.
FIG. 2 shows a state in which the socket 100 is separated from the plug 200, and FIG. 3 shows a state in which the socket 100 is attached to the plug 200.

Hereinafter, the plug 200 included in the connector 300 of the present embodiment will be described.
As shown in FIG. 2, the plug 200 includes a plug main body 210, an inner tube 220 attached to the lower portion of the plug main body 210 and formed in a cylindrical shape around the axis X <b> 1, and a cylindrical outer surface attached to the plug main body 210. The tube 230 and a sealing member 240 that seals between the outer tube 230 and the inner tube 220 are included.
Each member constituting the plug 200 is made of a fluororesin material such as PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer) or a crystalline thermoplastic resin such as HDPE (high density polyethylene).

  The plug body 210 is a member that is formed in a substantially cylindrical shape around the axis X1 and has an external thread 210a formed on the outer peripheral surface of the upper end portion. The plug main body 210 is fixed to the inner peripheral surface of the opening 410 by fastening the male screw 210 a of the plug main body 210 to the female screw 411 a formed on the inner peripheral surface of the opening 410.

A first liquid outflow channel 211, a first liquid inflow channel 212, and a first gas channel 213 are formed in the plug body 210.
The first liquid outflow channel 211 is a channel that takes out the liquid stored in the liquid storage container 400 and guides it to the outflow port 10. The first liquid inflow channel 212 is a channel that guides the liquid that flows in from the outside of the liquid storage container 400 via the inflow port 20 to the inside of the liquid storage container 400. The first gas flow path 213 is a flow path for circulating outside air between the internal space S <b> 1 of the liquid storage container 400 and the external space S <b> 2 of the liquid storage container 400.

The inner tube 220 is a member formed in a cylindrical shape along the axis X1. As shown in FIG. 1, the lower end (first lower end) 220 a of the inner tube 220 is disposed near the bottom of the liquid storage container 400 with the plug 200 attached to the opening 410 of the liquid storage container 400. The
The inner tube 220 is attached to the lower end of the plug main body 210 by heat welding and guides the liquid stored in the liquid storage container 400 to the first liquid outflow channel 211 of the plug main body 210.

The outer tube 230 is a member formed in a cylindrical shape along the axis X1. As shown in FIGS. 1 and 2, the lower end portion (second lower end portion) 230 a of the outer tube 230 is the lower end portion 220 a of the inner tube 220 in a state where the plug 200 is attached to the opening 410 of the liquid storage container 400. Is disposed above.
The outer tube 230 is attached to the outer peripheral surface below the plug main body 210 by press fitting and is disposed outside the inner tube 220. Between the inner peripheral surface of the outer tube 230 and the outer peripheral surface of the inner tube 220, an annular channel 214 that guides the liquid guided to the first liquid inflow channel 212 of the plug body 210 to the inside of the liquid storage container 400. Form.
The lower end portion 230a of the outer tube 230 has a plurality of outflow holes 231 through which the liquid flows out from the annular channel 214 to the inside of the liquid storage container 400 at a plurality of locations around the axis X (for example, four locations at 90 ° intervals). Is formed.

  The sealing member 240 is a member that seals between the inner peripheral surface of the lower end portion 230 a of the outer tube 230 and the outer peripheral surface of the inner tube 220. The sealing member 240 prevents the liquid flowing in from the annular channel 214 from being guided to the bottom surface of the liquid storage container 400 as it is along the axis X1. Since the lower end of the annular flow path 214 is sealed by the sealing member 240, the liquid that has reached the lower end of the annular flow path 214 passes through the outflow hole 231 as shown by an arrow in FIG. Flows into the interior.

Since the liquid falling from the upper side to the lower side along the annular channel 214 flows out from the plurality of outflow holes 231 in the horizontal direction (direction orthogonal to the axis X1), the liquid flows in a plurality of directions in which the plurality of outflow holes 231 open. The liquid flows out, and the liquid near the bottom surface of the liquid storage container 400 flows well. Therefore, when the liquid is a slurry containing an abrasive or the like (a suspension in which solid particles are dispersed), a state in which the solid particles and the liquid are well mixed in the vicinity of the bottom surface of the liquid storage container 400 is maintained.
In the above description, a plurality of outflow holes 231 are formed in the lower end portion 230a of the outer tube 230. However, a single outflow hole 231 may be formed in the lower end portion 230a of the outer tube 230. .

Hereinafter, the socket 100 provided in the connector 300 of this embodiment will be described.
As shown in FIG. 2, the socket 100 includes a socket body 110, a ball lock mechanism 120 attached to the socket body 110, and a columnar rotary valve that is inserted into a cylindrical insertion hole 114 formed in the socket body 110. 130 and an opening / closing mechanism 140 that rotates the rotary valve 130 about the axis X2 (second axis).

The socket main body 110 is a member formed in a substantially cylindrical shape around the axis X1, and includes a first main body 110a to which the outflow port 10 and the inflow port 20 are attached at the upper end, and a second main body into which the plug 200 is inserted at the lower end. Part 110b. Further, as shown in FIGS. 10 and 11 to be described later, the socket body 110 includes a communication member 110c, a plate-like member 110d, and a plate-like member 110e.
The second main body portion 110b is fixed by a socket member 122 of a ball lock mechanism 120 described later in a state where the second main body portion 110b is inserted into the lower end of the first main body portion 110a.

Inside the socket body 110, a second liquid outflow channel 111, a second liquid inflow channel 112, and a second gas channel 113 are formed.
The second liquid outflow passage 111 is a passage through which the liquid taken out from the first liquid outflow passage 211 via the outflow port 10 flows out. The second liquid inflow channel 112 is a channel that guides the liquid that flows in from the outside of the liquid storage container 400 via the inflow port 20 to the first liquid inflow channel 212. The second gas flow path 113 is connected to the first gas flow path 213 and allows external air to flow between the internal space S1 of the liquid storage container 400 and the external space S2 of the liquid storage container 400 via the vent port 30. It is a flow path.

  The ball lock mechanism 120 engages the plurality of lock balls 121 after engaging the engagement grooves 411 formed along the circumferential direction around the axis X on the outer peripheral surface of the opening 410 of the liquid storage container 400. This is a mechanism for fixing 121 to the engaging groove 411. By fixing the socket main body 110 to the opening 410 of the liquid storage container 400 using the ball lock mechanism 120, the socket 100 and the plug 200 are fixed.

  As shown in FIG. 2, the ball lock mechanism 120 includes a plurality of lock balls 121, a socket member (first cylindrical member) 122, a sleeve (second cylindrical member) 123, and a spring (biasing force generator). 124, a rotation restricting pin (rotation restricting mechanism) 125, a stop ring 126, and a spring receiving member 127.

The socket member 122 is a member that is formed in a cylindrical shape around the axis X <b> 1 and has a plurality of opening holes 122 a having a smaller diameter than the outer diameter of the spherical lock ball 121. As shown in FIGS. 2 and 3, the plurality of lock balls 121 are accommodated in the plurality of opening holes 122 a of the socket member 122. However, since the outer diameter of the lock ball 121 is larger than the diameter of the opening hole 122a, the lock ball 121 does not completely come out from the opening hole 122a to the inner peripheral side of the socket member 122.
The socket member 122 is fixed to the socket main body 110 by fastening a female screw 122b formed on the inner peripheral surface to a male screw formed on the outer peripheral surface of the first main body 110a of the socket main body 110.

The sleeve 123 is a member that is formed in a cylindrical shape around the axis X <b> 1 and is disposed on the outer peripheral side of the socket member 122. The upper end position of the sleeve 123 is regulated by the socket member 122, and the lower end position is regulated by an annular stop ring 126 attached to the outer peripheral surface on the lower end side of the socket member 122. The sleeve 123 is movable relative to the socket member 122 between the upper end position and the lower end position along the axis X1.
The sleeve 123 has a restricting portion 123 a that restricts the plurality of lock balls 121 accommodated in the opening holes 122 a to be engaged with the engaging grooves 411 of the opening portions 410.

  The spring 124 is an elastic member whose upper end (one end) along the axis X1 is fixed to the socket member 122 and whose lower end (the other end) along the axis X1 is fixed to the sleeve 123 via the spring receiving member 127. . The spring 124 generates an urging force due to elastic deformation, and urges the sleeve 123 toward a lower end position where the restricting portion 123 a of the sleeve 123 contacts the lock ball 121. The springs 124 are arranged at a plurality of locations (for example, six locations at 60 ° intervals) at equal intervals in the circumferential direction around the axis X1. By arranging the springs 124 at a plurality of positions at equal intervals, an equal urging force is applied to the sleeve 123.

Here, the spring receiving member 127 is a member formed in an annular shape around the axis X1, and is a member in which opening holes for accommodating the springs 124 are formed at a plurality of locations.
Here, the springs 124 are provided at a plurality of locations at equal intervals in the circumferential direction around the axis X1, but a single spring having the same diameter as the spring receiving member 127 may be provided centering on the axis X1. .

  The rotation restricting pin 125 is a member that restricts the sleeve 123 from rotating about the axis X <b> 1 with respect to the socket member 122. One end of the rotation restricting pin 125 is fixed to the outer peripheral surface of the socket member 122, and the other end is inserted into a rotation restricting groove (rotation restricting mechanism) 123b formed on the inner peripheral surface of the sleeve 123 along the axis X1. The rotation restricting mechanism configured by the rotation restricting pin 125 and the rotation restricting groove 123b restricts the sleeve 123 from rotating around the axis X1 with respect to the socket member 122, while the sleeve 123 has an axis relative to the socket member 122. Allow to move along X1.

Here, an operation of fixing the socket 100 to the opening 410 of the liquid container 400 using the ball lock mechanism 120 will be described.
As shown in FIG. 4, when attaching the socket 100 to the opening 410 of the liquid storage container 400, the operator pulls the sleeve 123 disposed on the outside upward along the axis X <b> 1 and restricts the portion 123 a of the sleeve 123. Is retracted so as not to contact the lock ball 121. In this case, the lock ball 121 is disposed at a solid line position that does not protrude from the opening hole 122a. The operator inserts the socket 100 into the plug 200 and the opening 410 in a state where the sleeve 123 is pulled upward along the axis X1 to obtain the state shown in FIG.

  As shown in FIG. 4, the tip portion 412 of the opening 410 has a tapered shape in which the outer diameter centering on the axis X1 increases with a constant gradient from the upper side to the lower side. Therefore, even when the lock ball 121 protrudes inward from the opening hole 122a when the socket 100 is attached to the opening 410, the lock ball 121 moves outward along the tip portion 412 of the tapered opening 410. Guided. Therefore, it is possible to suppress a problem in mounting the socket 100 to the opening 410 due to the contact between the lock ball 121 and the tip 412 of the opening 410.

When the operator inserts the socket 100 into the plug 200 to obtain the state shown in FIG. 4 and releases the hand from the sleeve 123, the lock ball 121 is engaged with the engagement groove 411 of the opening 410, and the socket 100 is It can be set as the state fixed to the outer peripheral surface of the opening part 410. FIG. This is because by releasing the sleeve 123, a downward biasing force is applied to the sleeve 123 from the spring 124, and the sleeve 123 moves to the lower end position where it abuts against the stop ring 126.
As shown in FIG. 5, when the sleeve 123 moves to the lower end position, the restricting portion 123 a moves to a position where it comes into contact with the lock ball 121, and the plurality of lock balls 121 are fixed to the engagement grooves 411. .

  Next, another aspect of the operation of fixing the socket 100 to the opening 410 of the liquid storage container 400 using the ball lock mechanism 120 will be described. In this aspect, the operator pushes the socket 100 into the plug 200 without touching the sleeve 123 so that the socket 100 is attached to the plug 200 with one touch.

  When attaching the socket 100 to the opening 410 of the liquid container 400 having the plug 200 fixed to the inner peripheral surface, the operator pushes the socket 100 into the plug 200 without touching the sleeve 123, so that the lock ball 121 is inserted. It can be in an evacuated state. This is because the force by which the operator pushes the socket 100 becomes a force that opposes the biasing force of the spring 124, and the sleeve 123 and the spring receiving member 127 that contacts the sleeve 123 move so that the lock ball can be retracted.

  Then, the operator pushes the socket 100 into the plug 200 until the lock ball 121 reaches the position of the engagement groove 411, whereby the lock ball 121 is fixed to the engagement groove 411 by the biasing force of the spring 124. To do. In this way, the operator can make the socket 100 fixed to the outer peripheral surface of the opening 410 without requiring complicated work.

  As shown in FIG. 6 (AA arrow cross-sectional view of the socket shown in FIG. 3), in a state where the plurality of lock balls 121 are fixed to the engagement grooves 411, the plurality of lock balls 121 are removed from the opening holes 122a. It will be in the state which protruded inside. Portions that protrude inward from the opening holes 122 a of the plurality of lock balls 121 are portions that engage with the engagement grooves 411.

The opening / closing mechanism 140 is a mechanism connected to a rotary valve 130 described later, and is a mechanism for switching the rotary valve 130 to either the open state or the closed state by rotating the rotary valve about the axis X2.
Here, the open state of the rotary valve 130 means that the outflow through hole 131 formed in the rotary valve 130 and the second liquid outflow passage 111 of the socket body 110 communicate with each other as shown in FIG. This refers to a state where the inflow through hole 132 formed in the valve 130 and the second liquid inflow channel 112 of the socket body 110 communicate with each other.
Further, the closed state of the rotary valve 130 means that, as shown in FIG. 2, the outflow through hole 131 formed in the rotary valve 130 and the second liquid outflow passage 111 of the socket body 110 do not communicate with each other, and This refers to a state in which the inflow through hole 132 formed in the valve 130 and the second liquid inflow channel 112 of the socket body 110 do not communicate with each other.

The opening / closing mechanism 140 includes a pair of lock cams (lock members) 141 connected to both ends of the rotary valve 130 and an opening / closing arm 142 that connects the pair of lock cams 141 and receives an opening / closing operation by an operator.
After fixing the plug 200 to the inner peripheral surface of the opening 410 and attaching the socket 100 to the outer peripheral surface of the opening 410, the operator grasps the tip of the opening / closing arm 142 shown in FIG. Rotate clockwise (in the direction indicated by the arrow in FIG. 7). As a result, the rotary valve 130 is switched from the closed state shown in FIG. 7 to the open state shown in FIG.
On the other hand, the operator holds the tip of the opening / closing arm 142 shown in FIG. 8 and rotates it counterclockwise (in the direction indicated by the arrow in FIG. 8) about the axis X2. Thereby, the rotary valve 130 is switched from the open state shown in FIG. 8 to the closed state shown in FIG.

The operator switches the open / close arm 142 from the state shown in FIG. 7 to the state shown in FIG. 8, so that the lock cam 141 is not in contact with the upper surface 123 c of the sleeve 123, and the lock cam 141 is on the upper surface 123 c of the sleeve 123. Switch to the locked state that touches.
In the locked state, the lock cam 141 is not necessarily in contact with the upper surface 123c of the sleeve 123. The locked state includes a state where the lower end of the lock cam 141 is disposed at a position close to the upper surface 123c of the sleeve 123 and the upward movement of the sleeve 123 is restricted.

In the locked state, the operator cannot release the state in which the ball locking mechanism 120 is fixed to the opening 410 by pulling the sleeve 123 upward. This is because the upper surface 123c of the sleeve 123 is in contact with the lock cam 141, and the sleeve 123 is restricted from moving upward along the axis X1.
As described above, in the socket 100 of the present embodiment, when the rotary valve 130 is in the open state, the sleeve 123 is restricted from moving upward along the axis X1, so that the liquid due to an erroneous operation or the like can be prevented. Outflow to the outside can be reliably prevented.

  As shown in FIG. 3, the rotary valve 130 is a member formed in a cylindrical shape along an axis X2 orthogonal to the axis X1. The rotary valve 130 is formed at the position where the second liquid inflow channel 112 on the axis X2 and the outflow through hole 131 formed at the position where the second liquid outflow channel 111 is disposed on the axis X2. And an inflow through-hole 132 to be provided.

  The rotary valve 130 is inserted into an insertion hole 114 formed in the socket body 110 so as to be rotatable around the axis X2. The insertion hole 114 is formed along the axis X2 so as to penetrate the second liquid outflow channel 111. The second liquid outflow channel 111 is divided into an upstream outflow channel 111b and a downstream outflow channel 111a by an insertion hole 114. Further, the insertion hole 114 is formed along the axis X2 so as to penetrate the second liquid inflow channel 112. The second liquid inflow channel 112 is divided by the insertion hole 114 into an upstream inflow channel 112a and a downstream inflow channel 112b.

Here, the flow state of each flow path of the socket 100 when the rotary valve 130 is closed will be described.
As shown in FIGS. 9 and 10, the rotary valve 130 has a discharge hole (first discharge hole) 133 having one end opened on the outer peripheral surface of the rotary valve 130 and the other end opened to the outflow through hole 131, and one end Has a discharge hole (second discharge hole) 134 that opens to the outer peripheral surface of the rotary valve 130 and the other end opens to the inflow through hole 132.

  The discharge hole 133 is a hole for discharging the liquid remaining in the outflow through hole 131 to the upstream outflow passage 111b when the rotary valve 130 is switched from the open state to the closed state. Similarly, the discharge hole 134 is a hole for discharging the liquid remaining in the inflow through hole 132 to the downstream inflow passage 112b when the rotary valve 130 is switched from the open state to the closed state.

9 and 10, when the rotary valve 130 is in a closed state, the O-ring 135 allows liquid to flow from the downstream outflow passage 111a between the outer peripheral surface of the rotary valve 130 and the inner peripheral surface of the insertion hole 114. It is a sealing member for sealing so as not to flow in. The O-ring 135 is press-fitted into an annular groove formed on the outer peripheral surface of the rotary valve 130.
Similarly, when the rotary valve 130 is closed, the O-ring 136 shown in FIG. 9 allows liquid to flow from the upstream inflow passage 112a between the outer peripheral surface of the rotary valve 130 and the inner peripheral surface of the insertion hole 114. It is a sealing member for sealing so as not to flow in. The O-ring 136 is press-fitted into an annular groove formed on the outer peripheral surface of the rotary valve 130.

  As shown in FIG. 10, a communication member 110c is attached to the first main body 110a. Further, the plate-like member 110d and the plate-like member 110e are arranged so as to sandwich the first main body portion 110a and the communication member 110c. The plate-like member 110d and the plate-like member 110e are connected to the first main body 110a by fastening the plate-like member 110d and the plate-like member 110e with the fastener in a state where a fastener (not shown) passes through the first main body 110a and the communication member 110c. The member 110c is fixed. The plate-like member 110d, the plate-like member 110e, and the fastener are preferably composed of a metal member such as stainless steel.

  As shown in FIGS. 10 and 11, the communication member 110c has a communication hole 115 formed therein. The communication hole 115 is a hole that allows the outflow through hole 131 and the inflow through hole 132 to communicate with each other when the rotary valve 130 is in a closed state. By providing the communication hole 115, when the rotary valve 130 is closed, the upstream outflow passage 111b, the discharge hole 133, the outflow through hole 131, the inflow through hole 132, the discharge hole 134, and the downstream inflow passage. 112b is in communication.

Next, the flow state of each flow path of the socket 100 when the rotary valve 130 is opened will be described.
As shown in FIGS. 12 and 13, when the rotary valve 130 is opened, the outflow through hole 131, the upstream outflow channel 111b, and the downstream outflow channel 111a communicate with each other, and the inflow through hole 132 is provided. And the upstream inflow channel 112a and the downstream inflow channel 112b communicate with each other.
As shown in FIGS. 12 and 13, when the rotary valve 130 is opened, the outflow through hole 131 and the communication hole 115 are not communicated with each other. Similarly, when the rotary valve 130 is opened, the inflow through hole 132 and the communication hole 115 are not communicated with each other.

Next, a socket cleaning device 500 for cleaning the socket 100 of the present embodiment will be described with reference to FIG.
The socket cleaning device 500 is a device that cleans the liquid remaining in the socket 100 with the rotary valve 130 closed. The socket cleaning device 500 includes a main body 510, an inflow port 520, and an outflow port 530.

The main body 510 includes an opening 511 to which the socket 100 is attached, an inflow passage 512 that communicates with the second liquid outflow passage 111 in a state in which the socket 100 is attached, and a second liquid in a state in which the socket 100 is attached. It has an outflow channel 513 communicating with the inflow channel 112.
An engagement groove is formed on the outer peripheral surface of the opening 511 so that the ball lock mechanism 120 of the socket 100 can be fixed.

  When the socket 100 is attached to the opening 511 of the socket cleaning device 500 and the rotary valve 130 is closed, the second liquid outflow channel 111 and the second liquid inflow channel are connected via the communication hole 115 as shown in FIG. 112 is in communication. When cleaning liquid (for example, pure water) is supplied from the supply source to the inflow port 520 by the pump 900 while the rotary valve 130 is in the closed state, the liquid flows from the inflow channel 512 to the second liquid outflow channel 111. To do. The liquid that has flowed into the second liquid outflow channel 111 flows into the second liquid inflow channel 112 through the communication hole 115 and is guided to the outflow channel 513. The liquid guided to the outflow channel 513 flows out from the outflow port 530 and is returned to the supply source again.

  The socket cleaning device 500 circulates the cleaning liquid in the socket 100 as described above, whereby the upstream outflow passage 111b, the discharge hole 133, the outflow through hole 131, the inflow through hole 132, and the discharge of the socket 100 are discharged. The hole 134, the downstream inflow channel 112b, and the communication hole 115 can be cleaned.

The operation and effects of the connector 300 of the present embodiment described above will be described.
According to the connector 300 of this embodiment, when the socket 100 is attached to the plug 200, the liquid taken out from the first liquid outflow passage 211 of the plug 200 is sucked into the socket 100 by sucking the liquid by the pump 600. It flows out through the second liquid outflow channel 111. Further, the liquid circulated by the pump 600 is guided from the first liquid inflow channel 212 of the plug 200 to the inside of the liquid storage container 400 through the second liquid inflow channel 112 of the socket 100. In addition, the amount of outside air that replaces the reduced amount of liquid stored in the liquid storage container is external to the liquid storage container 400 via the second gas flow path 113 of the socket 100 and the first gas flow path 213 of the plug 200. It is guided from the space S2 to the internal space S1.

  As described above, the connector 300 according to this embodiment includes the outflow of the liquid stored in the liquid storage container 400, the inflow of the liquid that has flowed out and circulated to the liquid storage container 400, and the liquid storage container 400. The outside air can be introduced according to the reduced amount of the liquid stored in the container.

  In addition, the socket 100 included in the connector 300 of this embodiment is configured such that the ball lock mechanism 120 causes the plurality of lock balls 121 to engage with the engagement grooves 411 formed on the outer peripheral surface of the opening 410 of the liquid storage container 400. Since these are fixed to the engaging groove 411, they can be securely attached to the plug 200 without requiring complicated work.

  According to the connector 300 of the present embodiment, when attaching the socket 100 to the opening 410 of the liquid storage container 400 with the plug 200 fixed to the inner peripheral surface, the operator places the sleeve 123 upward along the axis X1. The regulating part 123a is retracted so as not to contact the lock ball 121 by being drawn. Therefore, the operator can attach the socket 100 to the plug 200 in a state where the lock by the ball lock mechanism 120 is released. Further, the operator can put the socket 100 in a state of being fixed to the outer peripheral surface of the opening 410 without requiring a complicated operation by releasing the sleeve 123 after the socket 100 is attached to the plug 200. This is because when the sleeve 123 is released, the urging force from the spring 124 is applied to the sleeve 123 and the restricting portion 123a moves to a position where it comes into contact with the lock ball 121, and the plurality of lock balls 121 are fixed to the engagement grooves 411. It is because it will be in the state.

  Further, according to the connector 300 of the present embodiment, the operator can attach the socket 100 without touching the sleeve 123 when attaching the socket 100 to the opening 410 of the liquid storage container 400 having the plug 200 fixed to the inner peripheral surface. By pushing into the plug 200, the lock ball 121 can be retracted. This is because the force by which the operator pushes the socket 100 becomes a force that opposes the biasing force of the spring 124, and the sleeve 123 and the spring receiving member 127 that contacts the sleeve 123 move so that the lock ball can be retracted.

  Then, the operator pushes the socket 100 into the plug 200 until the lock ball 121 reaches the position of the engagement groove 411, whereby the lock ball 121 is fixed to the engagement groove 411 by the biasing force of the spring 124. To do. In this way, the operator can make the socket 100 fixed to the outer peripheral surface of the opening 410 without requiring complicated work.

In the connector 300 of the present embodiment, the ball lock mechanism 120 includes a rotation restricting pin 125 that restricts the sleeve 123 from rotating around the axis X <b> 1 with respect to the socket member 122.
By doing so, it is possible to suppress problems such as the sleeve 123 rotating around the axis X1 with respect to the socket member 122 and the urging force applied by the spring 124 to the sleeve 123 changing.

According to the connector 300 of the present embodiment, the second liquid outflow channel 111 and the inflow through hole 131 and the inflow through hole 132 are switched by switching the rotary valve 130 between the open state and the closed state by the opening / closing mechanism 140. The liquid is not circulated to the second liquid outflow passage 111 and the second liquid inflow passage 112 through the open state in which the liquid flows through the second liquid inflow passage 112 and the outflow through hole 131 and the inflow through hole 132. It can be switched to the closed state.
For this reason, solid particles accumulate at locations where the cross-sectional area of the flow path is locally reduced, which deteriorates the fluidity of the liquid, and the solid particles adhere to the urging mechanism of the valve body so that the valve can be opened and closed smoothly. It is possible to suppress problems that are not performed.

In the connector 300 of this embodiment, the opening / closing mechanism 140 has a lock cam 141 that restricts the sleeve 123 from moving upward along the axis X1 in the open state.
By doing so, the sleeve 123 is restricted from moving upward in the opened state of the rotary valve 130, so that the restricting portion 123 a is separated from the lock ball 121 and the socket 100 is detached from the outer peripheral surface of the opening 410. There is no end. Thereby, the outflow of the liquid to the exterior by erroneous operation etc. can be prevented reliably.

  According to the connector 300 of the present embodiment, the liquid guided to the first liquid inflow channel 212 formed inside the plug body 210 is the annular channel 214 formed between the inner tube 220 and the outer tube 230. To the inside of the liquid storage container 400 from the outflow hole 231 formed in the lower end portion 230 a of the outer tube 230. Since the liquid flows out from the outflow hole 231 of the lower end portion 230a of the outer tube 230, the liquid flows out in the direction in which the outflow hole 231 opens, and the liquid near the bottom surface of the liquid storage container 400 flows well. Therefore, when the liquid is a slurry containing an abrasive or the like (a suspension in which solid particles are dispersed), a state in which the solid particles and the liquid are well mixed in the vicinity of the bottom surface of the liquid storage container 400 is maintained.

The liquid storage container 400 of the present embodiment includes a container main body 420 that stores liquid, and an opening 410 that is provided on the upper surface of the container main body 420 and is formed in a cylindrical shape around the axis X1. The liquid container 400 can be attached with a connector 300 having a plug 200 fixed to the inner peripheral surface of the opening 410 and a socket 100 detachably attached to the plug 200. Engagement grooves 411 for engaging a plurality of lock balls 121 included in the ball lock mechanism 120 included in the socket 100 are formed on the outer peripheral surface of the opening 410 along the circumferential direction around the axis X1.
By doing in this way, the liquid storage container 400 which can engage the socket 100 provided with the ball lock mechanism 120 appropriately can be provided.

100 Socket 110 Socket body 111 Second liquid outflow passage 112 Second liquid inflow passage 113 Second gas passage 114 Insertion hole 115 Communication hole 120 Ball lock mechanism 121 Lock ball 122 Socket member (first cylindrical member)
123 Sleeve (second cylindrical member)
123a restricting portion 123b rotation restricting groove (rotation restricting mechanism)
123c Top surface 124 Spring (Biasing force generator)
125 Rotation restriction pin (rotation restriction mechanism)
126 Stop ring 127 Spring receiving member 130 Rotary valve 131 Outflow through hole 132 Inflow through hole 133 Discharge hole (first discharge hole)
134 Discharge hole (second discharge hole)
135,136 O-ring 140 Opening / closing mechanism 141 Lock cam (lock member)
142 Opening / closing arm 200 Plug 210 Plug body 220 Inner tube 230 Outer tube 240 Sealing member 300 Connector 400 Liquid storage container 410 Opening portion 411a Female thread 411 Engaging groove 412 Tip portion 420 Container body X1 Axis (first axis)
X2 axis (second axis)

Claims (8)

A connector that is attached to a liquid storage container provided with an opening formed in a cylindrical shape around a first axis,
A plug fixed to the inner peripheral surface of the opening;
A socket removably attached to the plug,
The plug is
A first liquid outflow path for taking out the liquid stored in the liquid storage container; a first liquid inflow path for guiding liquid flowing in from the outside of the liquid storage container to the inside of the liquid storage container; and the liquid storage container A plug main body formed therein with a first gas flow path for circulating outside air between the internal space and the external space of the liquid storage container,
The socket is
A second liquid outflow passage for letting out the liquid taken out from the first liquid outflow passage, and a second liquid inflow passage for guiding the liquid flowing in from the outside of the liquid storage container to the first liquid inflow passage; And a second main gas flow passage that is connected to the first gas flow path and allows external air to flow between the internal space of the liquid storage container and the external space of the liquid storage container. When,
A plurality of lock balls are engaged with engagement grooves formed along the circumferential direction around the first axis on the outer peripheral surface of the opening and attached to the socket body, and then the plurality of lock balls are engaged with the engagement. A ball lock mechanism that is fixed to the groove. The ball lock mechanism is
The plurality of rock balls;
A first cylindrical member formed in a cylindrical shape around the first axis and having a plurality of opening holes having a diameter smaller than the outer diameter of the lock ball;
A restriction that is formed in a cylindrical shape around the first axis and is disposed on the outer peripheral side of the first cylindrical member and restricts the lock ball received in the opening hole to be engaged with the engagement groove. A second cylindrical member having a portion;
One end along the first axis is fixed to the first cylindrical member, the other end along the first axis is fixed to the second cylindrical member, and the restricting portion contacts the lock ball. The connector according to claim 1, further comprising an urging force generator that urges the second cylindrical member toward a position. The ball lock mechanism is
The connector according to claim 2, further comprising a rotation restricting mechanism that restricts the second cylindrical member from rotating about the first axis with respect to the first cylindrical member. The socket body has a cylindrical insertion hole formed along a second axis intersecting the first axis so as to penetrate the second liquid outflow channel and the second liquid inflow channel,
The socket is
An outflow through hole formed at a position where the second liquid outflow channel on the second axis is disposed and an inflow formed at a position where the second liquid inflow channel is disposed on the second axis. A cylindrical rotary valve that is inserted into the insertion hole,
When the rotary valve rotates about the second axis, the outflow through hole communicates with the second liquid outflow channel, and the inflow through hole communicates with the second liquid inflow channel. An open / close mechanism that switches between an open state and a closed state in which the outflow through hole and the second liquid outflow channel do not communicate with each other, and the inflow through hole and the second liquid inflow channel do not communicate with each other. The connector of Claim 2 or Claim 3 which has. The opening and closing mechanism is
The connector according to claim 4, further comprising a lock member that restricts the second cylindrical member from moving upward along the first axis in the open state. The plug is
A cylindrical inner tube that is attached below the plug body and guides the liquid stored in the liquid storage container to the first liquid outflow passage;
A cylindrical outer tube that is attached to the plug body and disposed outside the inner tube, and forms an annular channel that guides the liquid guided to the first liquid inflow channel into the liquid storage container;
A sealing member that seals between the inner peripheral surface of the second lower end portion of the outer tube and the outer peripheral surface of the inner tube disposed above the first lower end portion of the inner tube;
The outflow hole through which the liquid flows out from the annular flow path to the inside of the liquid storage container is formed in the second lower end portion of the outer pipe. connector. A socket attached to a liquid storage container provided with an opening formed in a cylindrical shape around an axis on the upper surface,
A liquid outflow passage for letting out liquid taken out from a plug fixed to the inner peripheral surface of the opening to the outside, a liquid inflow passage for guiding liquid flowing in from the outside of the liquid storage container to the plug, and the liquid A socket body formed therein with a gas flow path for circulating outside air between the internal space of the storage container and the external space of the liquid storage container;
A ball lock mechanism for engaging a plurality of lock balls with engagement grooves formed along the circumferential direction around the axis on the outer peripheral surface of the opening, and then fixing the plurality of lock balls to the engagement grooves; , Comprising a socket. A container body for containing a liquid;
An opening provided in the upper surface of the container body and formed in a cylindrical shape around an axis,
A liquid storage container to which a connector having a plug fixed to the inner peripheral surface of the opening and a socket removably attached to the plug can be attached;
A liquid storage container in which an engagement groove for engaging a plurality of lock balls included in a ball lock mechanism included in the socket is formed on an outer peripheral surface of the opening along a circumferential direction around the axis.

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